Draft-deflector for lamp-burners.



E. S. SANDERSON. DRAFT DEFLEGTOR FOR LAMP BURNERS.

APPLICATION FILED AUG. 20, 1913.

Patented Feb. 1'7, 1914.

' I [NVLTNTOR QM m WITNESSES MANUFACTURING COMPANY, OF WATERBUR-Y, CONNECTICUT, A.

OF CONNECTICUT.

CORPORATION DBAFT-DEFLECTOR FOR LAMP-BURNER-S.

Specification of Letters Patent.

Patented Feb. 1?, 1914.

Application filed. August 20, 1913. Serial No. 785,759.

To all whom it may concern Be it known that I, EDWARD S. SANDER- soN, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a certain new and useful Improvement in Draft-Deflectors for Lamp Burners, of which the following is a full, clear, and exact description.

This invention relates to that class of flat-wick lamp burners in which a deflector is placed within the cone or dome and surrounds the wick tube in such way as to modify the air supply to the flame. These deflectors are made of metal, in various forms, and supported on the cone, or on the perforated air plate, or on the wick tube.

The object of this invention is to provide a very simple and economical draft or air deflector, in and by which the air is most efliciently distributed to the flame, so as to insure improved or increased illuminating results, due to steadying the and the avoiding of smoking under ordinary burning conditions, and especially when the wick is turned down so as to get a low flame.

The invention consists of a deflector of substantially the form of a hollow, truncated pyramid, preferably of sheet steel and seamless, adapted to be applied to a burner, so as to leave an air space around the wick tube, and having air ducts at its opposite ends, as I will proceed now to explain and finally claim.

In the accompanying drawings illustrating the invention,-in the several figures of which like parts are similarly designated,

Figure 1 is a perspective view of the deflector detached, and Fig. 2 is a top plan view thereof. Fig. 3 is a plan view of a burner supplied with the deflector of this invention. the burner cone being shown in horizontal section, the plane of section being substantially on a level with the top of the deflector. Fig. 4 is an inverted plan view of the cone with the deflector in position.

In the preferred construction, the deflector 1 is of the form of a hollow, oblong, truncated pyramid, of seamless construction, and formed from a cupped blank. The ends of the deflector are provided with vertically disposed corrugations or grooves 2, arranged on opposite sides of median portions 3 of said ends, and these corrugations or grooves are the air ductsprevlously mentloned.

As shown 1n Fig. 3, the deflector is enough larger than the flat wick tube 4, to afford a considerable air space all around the Wick tube; and as indicated in Fig. l the ends of the deflector lie relatively close to the wall of the cone.

By the construction described a free sup ply of air at the ends of the flame is obtained, and this supply is insured by the provision of the vertically disposed end corrugations or grooves.

The deflector should be held in place in the cone in any suitable way, or by any suitable means that will insure its rigidity or stability, one such provision, as herein shown, being the tongues 5, which extend upwardly from the median portions 3, and as indicated in Fig. 3, are'bent over on the cone at the ends of its flame slot, leaving the upper ends of the corrugations or grooves 2 entirely unobstructed; but any other suitable means may be used for supporting the deflector within the burner.

By the construction described, the flame willbe steadier in a draft, and the burner V will not smoke so readily when under ordinary burning conditions, and especially will not smoke so readily when turned low. When a burner is turned low, it is often found that the chimney will be badly coated. By the use of a deflector of the character described, these objections are largely or wholly overcome.

One of the greatest difficulties encountered in the use of kerosene deflector-burners is to produce a steady flame, that is to say, a flame that will not flicker or have a waving or curling motion, due, probably, to the air currents being agitated in difl'erent directions. Sometimes the air current takes on a spiral form, due probably to the circular cross-section of the burner cone or dome. Various devices have been used to overcome these difficulties, but in overcoming them care must be taken to avoid charring of the wick. depositions of carbon on the edges of the flame slot of the cone or dome, or on the edges of the deflector itself. which tend to produce a reddish-yellow flame of low candle-povver, and variations in the dimenpresent construction of deflectors, by stamp ing them from a single blank, without seam, a uniform structure is obtainable that practically avoids the enumerated ditliculties and secures the desired result.

The vertically disposed corrugations or grooves provide air ducts at the ends of the flame slot which open outside of the defiector and cause the air currents to flow directly upward, thus tending to prevent and in any case serving to break up any circular or spiral currents that would be inclined to form inside of the cone or dome. These corrugations or grooves not only thus direct the outside air-currents, but they also guide the a' =currents inside of the deflector, causing them to converge in their exit from the burner to the chimney; and furthermore, they provide a direct supply of air at the sides of the ends of the flame slot in the cone or dome, thus causing full combustion there and keeping the flame in most efficient shape.

The burner 6 herein shown is of well known construction, and its cone 7 in which the deflector is supported, is hinged to the body of the burner so as to be tiltable thereon; but, of course, the invention is not limited to use upon any particular form of burner.

l 'l' hat I claim is 1. A draft deflector for lamp burners, composed of a hollow, oblong, truncated pyramid of metal, the opposite ends of which are provided with vertically disposed grooves which form air ducts for controlling the air currents both inside and outside of the detlector, and means to support the deflector within the burner so to leave air spaces between itself and the wick tube in its interior and between itself and the surrounding cone on its outside.

2. A draft deflector for lamp burners, composed of a hollow, oblong, truncated pyramid of metal, having vertically disposed grooves on opposite sides of n edian portions in its ends arranged to direct the ascending air currents both inside and out side of the deflector, and means to support the deflector in a burner.

3. The combination with a burner having a wick tube and a surrounding cone, of a hollow, oblong, seamless truncated pyramid of metal, interposed between the wick tube and the cone, and having vertically arranged outside grooves in its opposite ends which form air ducts to control. the air currents going to the ends of the flame, and means to support the pyramid in the burner wholly out of contact with the wick-tube.

In testimony whereof I have hereunto set my hand this 19th day of August D. 1913.

EDWARD S. SrrNDER-SON.

Witnesses H. M. Bassn'r', R. HUME-mars.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

